Armature for dynamo-electric machines



1 2 H m {U c A l B 5 m E m T D S d 6 A n F ARMATURE FOR DYNAMO ELECTRICMACHINES Q wgyww Patented Apr. 3, 1923.

UNITED STATES 1,450,521 PATENT OFFICE.

ARTHUR STEINBAOH, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T0 LEOPODGORSEK, OF CHICAGO, ILLINOIS.

ARMATURE FOR DYNAMIC-ELECTRIC MACHINES.

Application filed December 31, 1921. Serial No. 526,087.

To all whom it may concern:

Be it known that I, ARTHUR STEINBACH, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Armatures forDynamo-Electric Machines, of which the following is a specification.

This invention relates to improvements in armatures for dynamo electricmachines.

One of the objects of the invention is to make a sectional armature corewith a coil on each section, so that the coils may be wound thereonconveniently by use of machinery, if preferred, before the sections areassembled.

Another object of the invention is to provide a sectional armature inwhich the sections may conveniently be separately taken from theassembled sections for repair or substitution.

Another object is to provide an improved section fastening means.

Another object is, generally, to improve armatures.

Other objects and advantages of the invention will readily appear from aconsideration of the following description when taken in conjunctionwith the drawings, wherein Fig. 1 is a transverse section of theimproved armature.

Fig. 2 is an axial section of the same.

In both views the same reference characters are employed to indicatesimilar parts.

In the embodiment shown each section 5 of the armature consists of apart of an armature core about each of which is wound a coil 6. Eachsection 5 is provided with a series of laminations of magneticallysusceptible material, such as soft iron or steel, held together by a rod7 and a nut 8 at one end, and a similar nut 9 at the other end. The rod7 is preferably pointed at each end, as at 10, and the pointed endsproject from the nuts 8 and 9 and they are held in and retained by aperforated disk 11. The disks, at each end of the armature, aresubstantially the same and are slidable on the armature shaft 12 and areconnected to the shaft by a key or feather 13. The shaft is preferablythreaded, as at 14:, at each end of the armature and a nut 15, at eachend, holds the disks 11 firmly in contact with the nuts 8 and 9 and theends 10 of the rod 7, thus providing means for rotatably driving theassembled sections of the armature and for separating them whenrequired. The rods 7 are pointed at their ends, at 10, so that when thedisks are pushed onto the rods the pointed ends 10 bring all of thearmature sections 5 as closely together as may be, and centrally withrespect to the shaft, until the wedge-shape portions 16 of the sections5 are in magnetic contact one with the other so as to make magneticcontinuity throughout the armature structure. The rods 7 do not cut themagnetic lines of force and, therefore, current is not induced in thembecause they are so far removed from the field magnets that arepartially to surround the armature. I have, however, shown a coating ofvarnish, or the like, 17 on the rods 7 to prevent electrical contactthereof with the sections 5, and the disks 11 may, if desired, be madeof non-conducting material, such as fiber or a condensation product,hard rubber or the like, which will be sufficiently strong to supportthe armature. 4

The coils 6 may be connected together in any suitable manner and willoperate satisfactorily when connected in the same manner in which thecoils of the Gramme ring are usually joined.

When the armature sections are assembled as shown in Fig. 1, and thedisks 11 are applied to the ends of the rods 7, the taper on the ends ofthe rods will uniformly draw the disks into close intimate contact sothat there will. be no lost motion or movement between the sections andthe disks 11 will prevent the nuts 9 from becoming loose incident to theuse of the armature as a. result of vibration produced by its rotation.

While I have herein described a single embodiment of my invention forthe purpose of clear disclosure, it will be manifest to persons skilledin the art, that many changes may be made in the general arrangement andconfiguration of the parts within the scope of the appended claims.

Having described my invention what I claim as new and desire to secureby Letters Patent, is

1. An armature providing a shaft and having a core divided on radiallines into a plurality of sections; a rod having pointed ends extendingthru each section and beyond the sections; a disk at each end having aperforation for each rod arranged so that said said sections are drawninwardly towards the axis of the armature and means on the shaft toforce the disks towards each other.

2. A sectional armature providing a shaft and having a core divided onsubstantially radial lines into a plurality of sections, each sectioncomposed of a plurality of laminae; a rod, pointed at both ends,extending thru respective sections with its ends projecting therebeyondat each end of the section; nuts on the rods to hold the laminaetogether; a disk slidable on the shaft overlying the nuts to preventtheir rotation and having a perf0- ration for each rod, arranged so thatall said sections are drawn inwardly into intimate contact when thedisksare in ultimate positions and nuts on the shaft to move the disks intoand to hold them in positions.

In testimony whereof I hereunto subscribed my name ARTHU'RMSTE'INB'ACH.

